Island



(No Model.)

S. VANSTONE. NUT BLANK AND MACHINE FOR MAKING SAME.

Pa tented Aug. 25, 1896.

WITNEEEEEI UNITED STATES SAMUEL VANSTONE, OF PROVIDENCE, RHODE ISLAND.

NUT-BLANK AND MACHINE FOR MAKING SAME.

SFECIFICATION forming part Of Letters Patent No. 566,684, dated August25, 1896. Applicati n filed October 25, 1895. Serial No. 566,906. (Nomodel.)

To all whom it may concern.-

Be it known that I, SAMUEL VANSTONE, a citizen of the United States,residing at Providence, in the State of Rhode Island, have invented anew and useful Improvement in Nut- Blanks and Machines for Making theSame, of which the following is a specification.

The object of my invention is to produce hexagonal nut-blanks from afiat rolled bar of narrower width than the distance between the oppositecorners of the blank without waste of stock; and it consists in a seriesof crowned hexagonal nut-blanks formed in a continuous bar havingserrated edges which conform to the opposite edges of the nutblanks, andhaving the blanks punched from one side to a thin web upon the oppositecrowned side of the blank.

It also consists in the improved construction and arrangement of theparts of the machine, whereby the nut-blankis punched and crowned bymeans of a reciprocating punch after the edges of the bar have beenfirst pressed into serrated form by means of rolls whose axes ofrotation are parallel with and in the same plane with the axis of thepunch, as hereinafter fully set forth.

In the accompanying drawings, Figure 1 represents a front elevation ofthe machine. Fig. 2 represents aside elevation of the same. Fig. 3represents a top view of the die-bed, showingthe recessed rolls. Fig. 4represents an under view of one of the ratchet-levers by means of whichthe rolls are operated. Fig. 5 represents an enlarged top View of thenut-blanks in the bar. Fig. 6 represents an enlarged side view of thepunch and the punch-socket. Fig. 7 represents a section of the same,takenin the line 7 7 of Fig. 6. Fig. 8 represents a section of the bar,taken in the line 8 8 of Fig. 5. Fig. 9 represents an enlarged top viewof the die. Fig. 10 represents a section taken in the line 10 10 of Fig.9.

I11 the drawings, A represents the frame of the machine; B, thecrank-shaft; C, the crank; D, the sliding head, andE the link whichconnects the sliding head with the crank. Upon the die-bed F, which is aforward projection of the frame A, is arranged the die G, the said diebeing provided with the recesses a a, adapted to receive the crownedside Z) of the nut-blank c in the bar II. Upon the upper ends of theupright shafts I I, which extend through the die-bed F, are secured therecessed rolls J J, which serve to serrate the opposite edges of the barK to form the opposite corners d d of the nut-blanks, the said shaftsbeing made adjustable toward each other by means of the set-screws L L.At the lower ends of the shafts I I are secured the gear-wheels M M, theteeth of which engage with each other, the said gears and their shafts II being operated for rotation by means of theratchetpawls N N, which arepivoted to the ratchet-levers O O and actuated toward the said gears bymeans of the springs P P. The ratchet arins O O are pivoted to the lowerends of the shafts I I and are actuated to impart the requiredintermittent rotary movement to the rolls J J by means of the levers QQ, which are pivoted to the. sides of the frame A by means of the boltsR R and actuated by means of the cams S Supon the shaft 13. The upperends of the levers Q Q, are provided with antifriction-rollers T T,which are held in contact with the periphery of the cams S S by means ofsprings If I.

The punch V, which is provided with the rounded end t and thepunch-socket V, is made hollow, as shown in the section Fig. 7, andprovided with the flexible pipes f f, through which water is made topass to cool the punch, and small grooves g g are formed on the shank toallow the liquid to escape to the outer side of the punch for cooling orlubricating purposes. The punch-socket V is provided at its rear withthe swaging-face W, which serves to swage the nut after it has beenfirst punched and crowned.

The operation of the machine is as follows: The red-hot bar of stock Yof the proper thickness, and of a width somewhat less than the distancebetween the opposite corners d d of the nut, is passed into the spacebetween the recessed peripheries of the rolls J J, and when the oppositecorners (Z d have been imperfectly impressed upon the bar and the punchV is brought down over the solid die G the rounded end 11 of the punchwill cause the spreading of the metal, so as to fill out the corners d(6 to the required degree of sharpness, and will leave a thin web ofunpunched metal at the crowned side of the bar, and as e scenes andspread, as before, and the previously formed nut-blank will be swaged bythe engagement of the swaging-face W with the upper surface of theblank. As the machine continues in operation the bar of nut-blanks Hwill be fed forward through the opening X to the rear of the machine.the gears MM may be readily changed for making nuts of different sizes,the said rolls and gears being removed from the shafts I I and otherssubstituted therefor, and in that case the stroke of the ratchet-pawls NN may be correspondingly varied by moving the pivot-bolts R R,.so as tochange the throw of the lower ends of the levers Q Q.

I claim as my invention- 1. A series of crowned hexagonal nut- The rollsJ J and blanks, formed in a continuous bar, the serrated edges of whichconform to the opposite edges of the nut -blanks, and having the blankspunched to a thin Web upon the crowned side of the blanks, substantiallyas described.

2. In a machine for making nut-blanks, the combination of theintermittently-operated recessed rolls, adapted to impart a serratedform to the opposite edges of the bar, and the solid crowning-dielocated in the plane of the axes of the recessed rolls, with thereciprocating punch having its axis located in the said plane, andadapted to punch the bar to a thin web at the crowned side,substantially as described. I

3. In a machine for making nut-blanks, the

combination of the intermittently-operated recessed rolls, adapted toimpart a serrated form to the opposite edges of the bar, with thereciprocating punch :having its axis located in the plane of the axes ofthe recessed rolls, and aswaging-face arranged to operate upon the barbehind the punch, substantially as described.

SAMUEL VANSTONE. \Vitnesses:

S. SCHOLFIELD, H. J. GARCEAU.

